Circular weaving loom



July 19, 1955 c s ET AL 2,713,353

CIRCULAR WEAVING LOOM Filed July 5, 1951 4 Sheets-Sheet 3 IN V EN TOR. Giusfo Cas -H y CW0 Cazzaniqa W 8. stamp.

July 19, 1955 Filed July 3, 1951 G. CASATI ET AL 4 SheetsSheet 4 FIG.6

40 f 1 27 a 47 I 3 H j f 10 42 43 44 4 4; 26

I FIG.7

38 INVENTOR.

BY Garb cuzanr a.

WicLu! S. Sir 11K Unite QIRCULAR waavrwo 1.60M

Ginsto Cnsati, Earzano, and Carlo Cazzaniga, Montieello, Italy Appiication Indy 3, 1951, Serial No. 2.343%

Ciaims priority, application Italy December 21, 195i 3 Claims. (Ci. 13l3) the known organizations are not compact and require a considerable amount of space. Furthermore, the threads are required to move through long complicated paths during the processing thereof into a woven fabric wound onto a spool. Also, very complicated structures are required in the known looms of this type to transmit drives to the various parts of the loom because of the inaccessible location of many of the driven parts of the loom and because of the necessity of avoiding the paths through which the threads move.

One of the objects of the present invention is to overcome the above drawbacks by organizing the parts of a circular loom in a very compact manner so that the entire loom structure consumes considerably less space than known circular looms.

A further object of the present invention is to provide a circular weaving loom which has the parts thereof organized in such a manner that the threads are smoothly guided along paths having a minimum number of curves during processing of the threads into a woven fabric which is gathered onto a winding spool.

Another object of the present invention is to arrange the parts of a circular weaving loom in such a manner that drives may be transmitted to the various driven parts of the loom with an exceedingly simple structure.

With the above objects in view the present invention mainly consists of a circular weaving loom which includes a hollow casing and an elongated beam means fixed at its lower end to the casing, extending upwardly from the latter, and having a top end portion located over and adjacent one side of the casing. A head member is fixed to the top end portion of the beam means and is formed with a vertical opening. An elongated, hollow, straight guide tube has a top end portion thereof extending into the opening of the head member and connected thereto, this guide tube extending downwardly to a point adjacent the casing. A bearing means is fixed to the underside of the head member and is located about the guide tube, and four beams, adapted to carry warp threads, are turnably mounted on the bearing means for respective rotation about four horizontal axes which intersect to form a square about the guide tube. A first ring is located in a horizontal plane beneath the four beams, about the guide tube, and is connected to the beam means to be carried thereby, so that warp threads from the four beams may be guided downwardly therefrom through the first ring. A second ring of a larger diameter than the first ring is located beneath the latter in a horizontal plane and is fixed to and located about the guide tube so that warp threads extending downwardly from the first ring may pass downwardly along the outside of the second ring. A circular plate is fixed to the guide tube adjacent the bottom end 2,713,353 Patented July 19, 1955 and is operatively connected to the sleeve to be driven.

upon rotation of the sleeve about the guide tube. An elongated main drive shaft extends downwardly through the guide tube and is turnably mounted therein, and a drive means is located above the head member in engagement with the drive shaftto rotate the latter. A gear means connects the drive shaft at a part thereof located below the guide tube to the sleeve for turning the latter on the guide tube. A support means is located next to the casing and adjacent the bottom thereof. A pair of drawing rollers are turnably mounted on the support means to draw woven fabric downwardly from an area located about the guide tube. Finally, a winding beam is turnably mounted in the casing to receive woven fabric from the drawing rollers.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

Fig. 1 is a general side view of a loom constructed in accordance with the present invention;

Fig. 2 is a sectional front view of the loom of Fig. 1;

Fig. 3 is a top view of gearing forming part of the loom;

Fig. 4 is a top view of the structure of Fig. 2;

Fig. 5 is an enlarged fragmentary view showing details of structure shown in Fig. 4;

Fig. 6 is a section taken along the line VIVI of Fig. 2; and

Fig. 7 is an enlarged fragmentary view of a detail of Fig. 2.

Referring to the drawings, the loom shown is formed by a standard or beam 1 (Fig. 1) supported and secured to a casing 2 forming a base therefor, within which a winding beam 27 for receiving the woven fabric is arranged (Figs. 2 and 6). Below the head 3 of said standard 1 four spools 4 carrying warp threads 11 are arranged along the sides of a square, said spools being mounted for rotation by their spindles in eight bearings 5 provided on arms 6 secured to the head 3 itself, such arms 6 being divided at their ends as best seen in Figs. 4 and S. A bracket 7 is secured to the standard 1, this bracket supporting in a horizontal plane a ring 8 through which the warp threads 11 pass from the spools 4 to the outer periphery of a second ring 9 also located in a horizontal plane and being of greater diameter than the ring 8. The ring 9 is secured to a central guide tube 10 within which the main loom shaft 19 is rotatably mounted, such guide tube 10 extending downwardly from the head 3. A casing 12 is also secured to the standard 1 by the bracket 13, in which casing a heddle device is arranged. Such device is driven by fabric pattern changing rollers (not visible), the

movement being obtained from a shaft 14 driven by a toothed wheel 15 (see Figs. 1 and 3), which is mounted on said shaft and engages with another toothed wheel 16 mounted on the main shaft 19 and inturn driven by a third toothed wheel 17 keyed on the shaft of a motor 18 located near the top of standard 1 (see Fig. 1).

At the lower end of the guide tube 10 there is arranged a number of weft carrying devices comprising rotating magnets 20 (Fig. 2), supporting weft carrying bobbins 21 and moving them around between the warp threads 11. The details of these weft carrying devices form no part of the present invention.

Two drawing rollers 22, 23 for the woven fabric are further provided, positioned below a ring 24 supported by a bracket 25 which is secured to the casing 2 (Fig. 1). These rollers 22, 23, in addition to pulling the fabric downwards, also act to flatten the same from the circular form in which it is woven. They are rotated by means of toothed bevel wheels 26, 26 driven by the cloth take-up beam 27 (Fig. 6), which in turn is rotated by a system comprising a shaft 28 (Fig. l), gearing in a casing 29, and the shaft 14, as later described.

Unwinding of the threads 11 from the spools 4 is controlled by braking devices as illustrated in Fig. 5, and each of which consists of a metal band In secured at one end to each arm 6 so as to embrace a disc on each spool 4 and to terminate at the other end at an adjusting screw 0 whereby a more or less strong braking action may be obtained.

Referring now particularly to Fig. 7, a plate 33 is secured to the guide tube 10, such plate being provided at its periphery with a toothed rim 32, with which there engages a number of toothed wheels 31 (Fig. 2), each forming part of a weft carrying device. There may for example be ten such devices, but the number may vary ii with the size of loom. This plate 33 also serves as an orbital base plate for the operation of weft beating up devices. These latter devices form no part of the present invention and are not shown in detail. They are shown diagrammatically at 21 in Fig. l. lecting bag 39 (Fig. 2) is secured below the plate 33 within the sheath formed by the woven fabric. Inside this bag is a four bladed fan fitted on a sleeve 38 (Fig. 7) which rotates on bearings mounted on the shaft 19, teeth on said sleeve 38 engaging with a toothed i wheel 37 keyed on the lower end of a shaft 36. Keyed on the main loom shaft 19 is a toothed wheel 35 engaging with a toothed wheel 34 keyed on the shaft 36, which latter extends through ball bearings in the plate 33. At the upper end of said shaft 36 there is keyed a toothed wheel 34, similar to 34, which wheel 34 engages with teeth 35 of a sleeve M rotatably mounted on the guide tube 10, such sleeve M being designed to carry the weft carrying devices comprising the magnets 20 and bobbins 21.

The rollers 22, 23 are mounted by means of their spindles on bearings 40 (Fig. 6) which are secured to the lower part of the casing 2 of the loom. The roller 23 is loose on its spindle, while the roller 22 is driven, its spindle extending beyond the bearing 40 to provide for the bevel wheel 26 to be keyed on it. This bevel wheel 26 engages the bevel wheel 26 keyed on a shaft 43 which at its other end bears a toothed wheel 44. The shaft 43 is mounted on two bearings 45, which are arranged in the casing 2. A conical worm 46 is mounted on the end of the shaft 28 (see also Fig. 2) and engages with said toothed wheel 44. The fabric drawing speed can be adjusted by means of said conical worm 46 by displacement along the shaft 28, so as to vary the portion of its periphery in contact with the wheel 44 and consequently vary the speed. At the level of a spindle of the take-up beam 27, a worm 41 (Fig. 2) is keyed on the shaft 28, such worm engaging with a toothed wheel 42 fitted on the spindle between the discs of a conventional friction clutch 43 fixedly located in the casing, such clutch being adapted for manual operation. The beam 27 is inserted into the casing 2 through a hole provided in the rear thereof and is mounted on two guides 47 which are supported by brackets 47 fixedly secured to the sides of the casing 2 (Fig. 2).

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of looms differing from the types described above.

A dust col- While the invention has been illustrated and described as embodied in circular weaving looms, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

t t hat is claimed as new and desired to be secured by Letters Patent is:

l. A circular weaving loom comprising, in combination, a hollow casing; elongated beam means fixed at a lower end thereof to said casing, extending upwardly from the latter, and having a top end portion located over and adjacent one side of said casing; a head member fixed to said top end portion of said beam means and being formed with a vertical opening passing therethrough; an elongated, hollow, straight guide tube having a top end portion extending into said opening of said head member and being joined to the latter, said guide tube extending downwardly to a point adjacent said casing; bearing means fixed to the underside of said head member and being located about said guide tube; a plurality of beams, adapted to carry warp threads, turnably mounted on said bearing means for respective rotation about horizontal axes which intersect to form a polygon about said guide tube; a first ring located in a horizontal plane beneath said beams, about said guide tube, and being connected to said beam means to be carried thereby, whereby warp threads from said beams may be guided downwardly therefrom through said first ring; a second ring of a larger diameter than said first ring located beneath the latter in a horizontal plane and being fixed to and located about said guide tube so that warp threads extending downwardly from said first ring may pass downwardly along the outside of said second ring; a circular plate fixed to said guide tube adjacent the bottom end thereof, being located in a horizontal plane, and having an annular toothed portion on its top side; a sleeve located about and being turnably mounted on said guide tube over and adjacent to said plate; weft carrying means engaging said annular toothed portion of said plate and being operatively connected to said sleeve to be driven upon rotation of said sleeve about said guide tube; an elongated main drive shaft extending downwardly through said guide tube and being turnably mounted therein; drive means engaging said drive shaft at a part thereof located above said head member to rotate said drive shaft; gear means connected to said drive shaft at a part thereof located below said guide tube and being operatively connected to said sleeve for turning the latter on said guide tube; support means located next to said casing on said one side thereof and adjacent the bottom of said casing; a pair of drawing rollers turnably mounted on said support means for rotation about a pair of horizontal, parallel axes, respectively, and being adapted to draw woven fabric extending downwardly from said guide tube and drive shaft and located about the latter; and a winding beam turnably mounted in said casing for rotation about a horizontal axis and being adapted to receive woven fabric from said drawing rollers.

2. A circular weaving loom as defined in claim 1 and wherein there are four beams located along four horizontal axes, respectively, and wherein said bearing means is in the form of four arms extending downwardly from said head member, located apart from each other, and each having a bifurcated free end portion provided with a pair of bearings located about an intersecting pair of said four horizontal axes, forming said square, and

respectively supporting ends of two of said four warp thread carrying beams.

3. A circular weaving loom as defined in claim 1 and wherein one of said drawing rollers is freely turnable on said support means and a turning means is operatively connected to the other of said drawing rollers for rotating the latter.

4. A circular weaving loom as defined in claim 1 and wherein said casing is formed with an opening through which said winding beam may be inserted into said casing; bearing means located in said casing to support said Winding beam for rotation therein; and a drive extending from said drive means to said winding beam for rotating the latter and including a manually operable clutch for stopping and starting the rotation of said winding beam.

5. A circular weaving loom as defined in claim 1 and wherein said casing is formed with an opening through which said winding beam may be inserted into and removed from said casing.

6. A circular weaving loom as defined in claim 1 and wherein a fan means is located at the lower end portion of said drive shaft.

7. A circular weaving loom as defined in claim 6 and wherein said fan means comprises a hub turnably mounted on said lower end portion of said main drive shaft for free rotation with respect to the latter; a plurality of fan blades extending from said hub; and a gear drive connected to said drive shaft to be operated thereby and engaging said hub to rotate the latter and said blades therewith.

8. A circular weaving loom as defined in claim 7 and wherein a bag is located about said fan means within the fabric moving downwardly toward said drawing rollers.

1 5s ierences Cited in the file of this patent UNITED STATES PATENTS 2,007,397 Jabouley July 9, 1935 2,080,772 Hale May 18, 1937 2,087,322 Jabouley July 20, 1937 2,091,333 P001 Aug. 31, 1937 2,273,325 Kinsella Feb. 17, 1942 2,353,387 Canney July 11, 1944 2,480,690 Ancet Aug. 30, 1949 2,582,092 Ancet Jan. 8, 1952 FOREIGN PATENTS 447,388 Great Britain Published 1936 (Spec. not accepted) 

